/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-19 17:40:38,957 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 17:40:38,961 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 17:40:39,018 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-19 17:40:39,019 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-19 17:40:39,023 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-19 17:40:39,027 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-19 17:40:39,036 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-19 17:40:39,039 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-19 17:40:39,047 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-19 17:40:39,048 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-19 17:40:39,049 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-19 17:40:39,050 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-19 17:40:39,052 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-19 17:40:39,055 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-19 17:40:39,056 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-19 17:40:39,060 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-19 17:40:39,061 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-19 17:40:39,069 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-19 17:40:39,074 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-19 17:40:39,076 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-19 17:40:39,081 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-19 17:40:39,082 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-19 17:40:39,083 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-19 17:40:39,089 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-19 17:40:39,099 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-19 17:40:39,100 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-19 17:40:39,101 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-19 17:40:39,102 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-02-19 17:40:39,128 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 17:40:39,129 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 17:40:39,130 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 17:40:39,131 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 17:40:39,131 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 17:40:39,131 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 17:40:39,131 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 17:40:39,132 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 17:40:39,132 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 17:40:39,132 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 17:40:39,144 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 17:40:39,145 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 17:40:39,145 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 17:40:39,145 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 17:40:39,145 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 17:40:39,145 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 17:40:39,146 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 17:40:39,146 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 17:40:39,146 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 17:40:39,146 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 17:40:39,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 17:40:39,147 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 17:40:39,147 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 17:40:39,147 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 17:40:39,147 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 17:40:39,148 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 17:40:39,148 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 17:40:39,148 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-19 17:40:39,148 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 17:40:39,493 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 17:40:39,540 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 17:40:39,543 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 17:40:39,544 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-19 17:40:39,545 INFO L275 PluginConnector]: CDTParser initialized [2021-02-19 17:40:39,546 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_10.c [2021-02-19 17:40:39,620 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84556fdfd/813778f5e576423fa468d0957eeb46ad/FLAGa96d41ce3 [2021-02-19 17:40:40,312 INFO L306 CDTParser]: Found 1 translation units. [2021-02-19 17:40:40,314 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_10.c [2021-02-19 17:40:40,325 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84556fdfd/813778f5e576423fa468d0957eeb46ad/FLAGa96d41ce3 [2021-02-19 17:40:40,646 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84556fdfd/813778f5e576423fa468d0957eeb46ad [2021-02-19 17:40:40,651 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 17:40:40,666 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 17:40:40,668 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-19 17:40:40,668 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-19 17:40:40,672 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-19 17:40:40,673 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 05:40:40" (1/1) ... [2021-02-19 17:40:40,674 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25a41017 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:40:40, skipping insertion in model container [2021-02-19 17:40:40,674 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 05:40:40" (1/1) ... [2021-02-19 17:40:40,682 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-19 17:40:40,702 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-19 17:40:40,863 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_10.c[3901,3914] [2021-02-19 17:40:40,867 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-19 17:40:40,877 INFO L203 MainTranslator]: Completed pre-run [2021-02-19 17:40:40,904 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_10.c[3901,3914] [2021-02-19 17:40:40,905 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-19 17:40:40,921 INFO L208 MainTranslator]: Completed translation [2021-02-19 17:40:40,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:40:40 WrapperNode [2021-02-19 17:40:40,921 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-19 17:40:40,923 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 17:40:40,923 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 17:40:40,923 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 17:40:40,936 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:40:40" (1/1) ... [2021-02-19 17:40:40,936 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:40:40" (1/1) ... [2021-02-19 17:40:40,944 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:40:40" (1/1) ... [2021-02-19 17:40:40,945 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:40:40" (1/1) ... [2021-02-19 17:40:40,952 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:40:40" (1/1) ... [2021-02-19 17:40:40,959 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:40:40" (1/1) ... [2021-02-19 17:40:40,961 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:40:40" (1/1) ... [2021-02-19 17:40:40,964 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 17:40:40,965 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 17:40:40,965 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 17:40:40,966 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 17:40:40,967 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:40:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 17:40:41,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-19 17:40:41,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 17:40:41,061 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-19 17:40:41,061 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-19 17:40:41,061 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-19 17:40:41,061 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-19 17:40:41,061 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-19 17:40:41,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-19 17:40:41,062 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-19 17:40:41,062 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-19 17:40:41,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-19 17:40:41,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-19 17:40:41,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 17:40:41,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-19 17:40:41,063 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-19 17:40:41,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-19 17:40:41,453 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 17:40:41,453 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-19 17:40:41,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:40:41 BoogieIcfgContainer [2021-02-19 17:40:41,455 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 17:40:41,458 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 17:40:41,458 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 17:40:41,462 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 17:40:41,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.02 05:40:40" (1/3) ... [2021-02-19 17:40:41,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71db41ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 05:40:41, skipping insertion in model container [2021-02-19 17:40:41,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:40:40" (2/3) ... [2021-02-19 17:40:41,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71db41ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 05:40:41, skipping insertion in model container [2021-02-19 17:40:41,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:40:41" (3/3) ... [2021-02-19 17:40:41,466 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_10.c [2021-02-19 17:40:41,474 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 17:40:41,479 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 17:40:41,528 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-19 17:40:41,569 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 17:40:41,570 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 17:40:41,570 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 17:40:41,572 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 17:40:41,572 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 17:40:41,572 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 17:40:41,572 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 17:40:41,573 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 17:40:41,610 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2021-02-19 17:40:41,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:40:41,620 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:40:41,622 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:40:41,622 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:40:41,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:40:41,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1465526181, now seen corresponding path program 1 times [2021-02-19 17:40:41,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:40:41,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993926514] [2021-02-19 17:40:41,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:40:41,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:41,965 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:41,966 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:41,967 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:41,968 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:40:41,981 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:41,982 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:42,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:40:42,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:42,053 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:42,054 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:42,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:40:42,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993926514] [2021-02-19 17:40:42,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:40:42,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:40:42,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850475228] [2021-02-19 17:40:42,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:40:42,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:40:42,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:40:42,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:40:42,101 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 4 states. [2021-02-19 17:40:42,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:40:42,433 INFO L93 Difference]: Finished difference Result 88 states and 151 transitions. [2021-02-19 17:40:42,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:40:42,435 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2021-02-19 17:40:42,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:40:42,452 INFO L225 Difference]: With dead ends: 88 [2021-02-19 17:40:42,452 INFO L226 Difference]: Without dead ends: 73 [2021-02-19 17:40:42,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:40:42,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-02-19 17:40:42,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 51. [2021-02-19 17:40:42,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-02-19 17:40:42,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 90 transitions. [2021-02-19 17:40:42,523 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 90 transitions. Word has length 21 [2021-02-19 17:40:42,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:40:42,524 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 90 transitions. [2021-02-19 17:40:42,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:40:42,524 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 90 transitions. [2021-02-19 17:40:42,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:40:42,526 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:40:42,526 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:40:42,526 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 17:40:42,527 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:40:42,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:40:42,528 INFO L82 PathProgramCache]: Analyzing trace with hash -2052332195, now seen corresponding path program 1 times [2021-02-19 17:40:42,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:40:42,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708405667] [2021-02-19 17:40:42,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:40:42,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:42,614 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:42,615 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:42,615 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:42,616 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:40:42,619 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:42,620 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:42,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:40:42,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:42,656 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:42,657 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:42,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:40:42,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708405667] [2021-02-19 17:40:42,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:40:42,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:40:42,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943242626] [2021-02-19 17:40:42,662 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:40:42,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:40:42,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:40:42,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:40:42,663 INFO L87 Difference]: Start difference. First operand 51 states and 90 transitions. Second operand 4 states. [2021-02-19 17:40:42,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:40:42,882 INFO L93 Difference]: Finished difference Result 118 states and 213 transitions. [2021-02-19 17:40:42,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:40:42,884 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2021-02-19 17:40:42,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:40:42,889 INFO L225 Difference]: With dead ends: 118 [2021-02-19 17:40:42,889 INFO L226 Difference]: Without dead ends: 73 [2021-02-19 17:40:42,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:40:42,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-02-19 17:40:42,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2021-02-19 17:40:42,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-02-19 17:40:42,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 126 transitions. [2021-02-19 17:40:42,921 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 126 transitions. Word has length 21 [2021-02-19 17:40:42,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:40:42,922 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 126 transitions. [2021-02-19 17:40:42,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:40:42,922 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 126 transitions. [2021-02-19 17:40:42,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:40:42,925 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:40:42,927 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:40:42,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 17:40:42,928 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:40:42,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:40:42,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1813542028, now seen corresponding path program 1 times [2021-02-19 17:40:42,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:40:42,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782148706] [2021-02-19 17:40:42,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:40:42,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:42,987 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:42,988 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:42,989 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:42,989 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-19 17:40:42,993 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:42,993 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:43,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:40:43,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:43,025 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:43,026 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:43,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:40:43,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782148706] [2021-02-19 17:40:43,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:40:43,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:40:43,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267408723] [2021-02-19 17:40:43,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:40:43,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:40:43,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:40:43,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:40:43,031 INFO L87 Difference]: Start difference. First operand 71 states and 126 transitions. Second operand 4 states. [2021-02-19 17:40:43,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:40:43,190 INFO L93 Difference]: Finished difference Result 109 states and 190 transitions. [2021-02-19 17:40:43,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:40:43,190 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2021-02-19 17:40:43,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:40:43,192 INFO L225 Difference]: With dead ends: 109 [2021-02-19 17:40:43,192 INFO L226 Difference]: Without dead ends: 76 [2021-02-19 17:40:43,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:40:43,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-02-19 17:40:43,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2021-02-19 17:40:43,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-02-19 17:40:43,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 128 transitions. [2021-02-19 17:40:43,203 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 128 transitions. Word has length 22 [2021-02-19 17:40:43,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:40:43,204 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 128 transitions. [2021-02-19 17:40:43,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:40:43,204 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 128 transitions. [2021-02-19 17:40:43,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:40:43,205 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:40:43,205 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:40:43,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-19 17:40:43,206 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:40:43,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:40:43,206 INFO L82 PathProgramCache]: Analyzing trace with hash 802424778, now seen corresponding path program 1 times [2021-02-19 17:40:43,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:40:43,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114390147] [2021-02-19 17:40:43,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:40:43,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:43,266 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:43,267 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:43,267 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:43,268 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:40:43,271 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:43,272 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:43,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:40:43,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:43,298 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:43,299 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:43,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:40:43,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114390147] [2021-02-19 17:40:43,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:40:43,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:40:43,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631989740] [2021-02-19 17:40:43,302 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:40:43,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:40:43,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:40:43,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:40:43,303 INFO L87 Difference]: Start difference. First operand 74 states and 128 transitions. Second operand 4 states. [2021-02-19 17:40:43,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:40:43,448 INFO L93 Difference]: Finished difference Result 202 states and 360 transitions. [2021-02-19 17:40:43,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:40:43,448 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2021-02-19 17:40:43,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:40:43,450 INFO L225 Difference]: With dead ends: 202 [2021-02-19 17:40:43,450 INFO L226 Difference]: Without dead ends: 137 [2021-02-19 17:40:43,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:40:43,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-02-19 17:40:43,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2021-02-19 17:40:43,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2021-02-19 17:40:43,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 237 transitions. [2021-02-19 17:40:43,464 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 237 transitions. Word has length 22 [2021-02-19 17:40:43,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:40:43,464 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 237 transitions. [2021-02-19 17:40:43,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:40:43,465 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 237 transitions. [2021-02-19 17:40:43,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:40:43,466 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:40:43,466 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:40:43,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-19 17:40:43,466 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:40:43,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:40:43,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1389230792, now seen corresponding path program 1 times [2021-02-19 17:40:43,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:40:43,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792917006] [2021-02-19 17:40:43,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:40:43,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:43,494 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:43,495 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:43,495 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:43,496 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:40:43,499 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:43,499 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:43,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:40:43,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:43,524 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:43,525 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:43,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:40:43,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792917006] [2021-02-19 17:40:43,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:40:43,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:40:43,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464127623] [2021-02-19 17:40:43,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:40:43,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:40:43,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:40:43,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:40:43,529 INFO L87 Difference]: Start difference. First operand 135 states and 237 transitions. Second operand 4 states. [2021-02-19 17:40:43,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:40:43,656 INFO L93 Difference]: Finished difference Result 175 states and 307 transitions. [2021-02-19 17:40:43,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:40:43,661 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2021-02-19 17:40:43,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:40:43,663 INFO L225 Difference]: With dead ends: 175 [2021-02-19 17:40:43,664 INFO L226 Difference]: Without dead ends: 173 [2021-02-19 17:40:43,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:40:43,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-02-19 17:40:43,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 135. [2021-02-19 17:40:43,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2021-02-19 17:40:43,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 235 transitions. [2021-02-19 17:40:43,698 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 235 transitions. Word has length 22 [2021-02-19 17:40:43,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:40:43,698 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 235 transitions. [2021-02-19 17:40:43,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:40:43,698 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 235 transitions. [2021-02-19 17:40:43,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:40:43,700 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:40:43,700 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:40:43,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-19 17:40:43,701 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:40:43,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:40:43,702 INFO L82 PathProgramCache]: Analyzing trace with hash -894421934, now seen corresponding path program 1 times [2021-02-19 17:40:43,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:40:43,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610541595] [2021-02-19 17:40:43,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:40:43,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:43,738 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:43,739 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:43,739 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:43,740 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:40:43,742 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:43,743 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:43,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:40:43,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:43,766 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:43,766 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:43,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:40:43,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610541595] [2021-02-19 17:40:43,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:40:43,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:40:43,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859173889] [2021-02-19 17:40:43,769 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:40:43,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:40:43,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:40:43,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:40:43,770 INFO L87 Difference]: Start difference. First operand 135 states and 235 transitions. Second operand 4 states. [2021-02-19 17:40:43,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:40:43,891 INFO L93 Difference]: Finished difference Result 251 states and 443 transitions. [2021-02-19 17:40:43,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:40:43,892 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2021-02-19 17:40:43,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:40:43,894 INFO L225 Difference]: With dead ends: 251 [2021-02-19 17:40:43,894 INFO L226 Difference]: Without dead ends: 249 [2021-02-19 17:40:43,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:40:43,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-02-19 17:40:43,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 183. [2021-02-19 17:40:43,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2021-02-19 17:40:43,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 317 transitions. [2021-02-19 17:40:43,907 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 317 transitions. Word has length 23 [2021-02-19 17:40:43,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:40:43,908 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 317 transitions. [2021-02-19 17:40:43,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:40:43,908 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 317 transitions. [2021-02-19 17:40:43,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:40:43,910 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:40:43,910 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:40:43,910 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-19 17:40:43,910 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:40:43,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:40:43,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1481227948, now seen corresponding path program 1 times [2021-02-19 17:40:43,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:40:43,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962975243] [2021-02-19 17:40:43,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:40:43,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:43,937 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:43,938 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:43,938 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:43,939 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:40:43,941 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:43,942 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:43,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:40:43,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:43,965 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:43,966 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:43,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:40:43,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962975243] [2021-02-19 17:40:43,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:40:43,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:40:43,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335413520] [2021-02-19 17:40:43,968 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:40:43,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:40:43,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:40:43,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:40:43,969 INFO L87 Difference]: Start difference. First operand 183 states and 317 transitions. Second operand 4 states. [2021-02-19 17:40:44,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:40:44,099 INFO L93 Difference]: Finished difference Result 431 states and 755 transitions. [2021-02-19 17:40:44,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:40:44,100 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2021-02-19 17:40:44,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:40:44,102 INFO L225 Difference]: With dead ends: 431 [2021-02-19 17:40:44,102 INFO L226 Difference]: Without dead ends: 257 [2021-02-19 17:40:44,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:40:44,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-02-19 17:40:44,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 255. [2021-02-19 17:40:44,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2021-02-19 17:40:44,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 439 transitions. [2021-02-19 17:40:44,117 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 439 transitions. Word has length 23 [2021-02-19 17:40:44,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:40:44,118 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 439 transitions. [2021-02-19 17:40:44,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:40:44,118 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 439 transitions. [2021-02-19 17:40:44,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 17:40:44,120 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:40:44,120 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:40:44,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-19 17:40:44,120 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:40:44,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:40:44,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1957062113, now seen corresponding path program 1 times [2021-02-19 17:40:44,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:40:44,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692305323] [2021-02-19 17:40:44,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:40:44,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:44,146 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:44,146 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:44,147 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:44,147 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-19 17:40:44,150 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:44,150 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:44,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:40:44,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:44,173 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:44,174 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:44,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:40:44,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692305323] [2021-02-19 17:40:44,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:40:44,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:40:44,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779685423] [2021-02-19 17:40:44,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:40:44,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:40:44,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:40:44,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:40:44,177 INFO L87 Difference]: Start difference. First operand 255 states and 439 transitions. Second operand 4 states. [2021-02-19 17:40:44,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:40:44,290 INFO L93 Difference]: Finished difference Result 385 states and 661 transitions. [2021-02-19 17:40:44,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:40:44,290 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2021-02-19 17:40:44,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:40:44,292 INFO L225 Difference]: With dead ends: 385 [2021-02-19 17:40:44,292 INFO L226 Difference]: Without dead ends: 263 [2021-02-19 17:40:44,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:40:44,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-02-19 17:40:44,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 261. [2021-02-19 17:40:44,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2021-02-19 17:40:44,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 443 transitions. [2021-02-19 17:40:44,306 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 443 transitions. Word has length 24 [2021-02-19 17:40:44,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:40:44,306 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 443 transitions. [2021-02-19 17:40:44,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:40:44,306 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 443 transitions. [2021-02-19 17:40:44,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 17:40:44,307 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:40:44,308 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:40:44,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-19 17:40:44,308 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:40:44,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:40:44,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1326787933, now seen corresponding path program 1 times [2021-02-19 17:40:44,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:40:44,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250620413] [2021-02-19 17:40:44,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:40:44,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:44,329 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:44,330 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:44,330 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:44,330 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:40:44,333 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:44,334 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:44,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:40:44,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:44,357 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:44,360 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:44,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:40:44,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250620413] [2021-02-19 17:40:44,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:40:44,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:40:44,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335388037] [2021-02-19 17:40:44,377 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:40:44,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:40:44,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:40:44,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:40:44,378 INFO L87 Difference]: Start difference. First operand 261 states and 443 transitions. Second operand 4 states. [2021-02-19 17:40:44,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:40:44,507 INFO L93 Difference]: Finished difference Result 477 states and 821 transitions. [2021-02-19 17:40:44,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:40:44,507 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2021-02-19 17:40:44,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:40:44,510 INFO L225 Difference]: With dead ends: 477 [2021-02-19 17:40:44,511 INFO L226 Difference]: Without dead ends: 475 [2021-02-19 17:40:44,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:40:44,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-02-19 17:40:44,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 361. [2021-02-19 17:40:44,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2021-02-19 17:40:44,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 603 transitions. [2021-02-19 17:40:44,527 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 603 transitions. Word has length 24 [2021-02-19 17:40:44,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:40:44,527 INFO L480 AbstractCegarLoop]: Abstraction has 361 states and 603 transitions. [2021-02-19 17:40:44,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:40:44,527 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 603 transitions. [2021-02-19 17:40:44,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 17:40:44,529 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:40:44,529 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:40:44,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-19 17:40:44,529 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:40:44,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:40:44,530 INFO L82 PathProgramCache]: Analyzing trace with hash 739981919, now seen corresponding path program 1 times [2021-02-19 17:40:44,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:40:44,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609134534] [2021-02-19 17:40:44,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:40:44,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:44,553 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:44,553 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:44,554 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:44,554 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:40:44,557 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:44,557 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:44,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:40:44,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:44,583 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:44,583 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:44,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:40:44,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609134534] [2021-02-19 17:40:44,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:40:44,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:40:44,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703438762] [2021-02-19 17:40:44,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:40:44,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:40:44,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:40:44,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:40:44,587 INFO L87 Difference]: Start difference. First operand 361 states and 603 transitions. Second operand 4 states. [2021-02-19 17:40:44,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:40:44,705 INFO L93 Difference]: Finished difference Result 845 states and 1421 transitions. [2021-02-19 17:40:44,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:40:44,706 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2021-02-19 17:40:44,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:40:44,708 INFO L225 Difference]: With dead ends: 845 [2021-02-19 17:40:44,709 INFO L226 Difference]: Without dead ends: 499 [2021-02-19 17:40:44,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:40:44,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-02-19 17:40:44,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 497. [2021-02-19 17:40:44,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 497 states. [2021-02-19 17:40:44,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 823 transitions. [2021-02-19 17:40:44,730 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 823 transitions. Word has length 24 [2021-02-19 17:40:44,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:40:44,731 INFO L480 AbstractCegarLoop]: Abstraction has 497 states and 823 transitions. [2021-02-19 17:40:44,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:40:44,731 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 823 transitions. [2021-02-19 17:40:44,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:40:44,732 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:40:44,732 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:40:44,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-19 17:40:44,733 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:40:44,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:40:44,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1819032631, now seen corresponding path program 1 times [2021-02-19 17:40:44,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:40:44,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996143076] [2021-02-19 17:40:44,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:40:44,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:44,753 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:44,753 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:44,754 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:44,754 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-19 17:40:44,758 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:44,759 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:44,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:40:44,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:44,782 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:44,782 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:44,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:40:44,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996143076] [2021-02-19 17:40:44,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:40:44,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:40:44,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181937608] [2021-02-19 17:40:44,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:40:44,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:40:44,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:40:44,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:40:44,786 INFO L87 Difference]: Start difference. First operand 497 states and 823 transitions. Second operand 4 states. [2021-02-19 17:40:44,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:40:44,909 INFO L93 Difference]: Finished difference Result 745 states and 1229 transitions. [2021-02-19 17:40:44,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:40:44,909 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2021-02-19 17:40:44,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:40:44,913 INFO L225 Difference]: With dead ends: 745 [2021-02-19 17:40:44,913 INFO L226 Difference]: Without dead ends: 507 [2021-02-19 17:40:44,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:40:44,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-02-19 17:40:44,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 505. [2021-02-19 17:40:44,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2021-02-19 17:40:44,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 823 transitions. [2021-02-19 17:40:44,935 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 823 transitions. Word has length 25 [2021-02-19 17:40:44,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:40:44,935 INFO L480 AbstractCegarLoop]: Abstraction has 505 states and 823 transitions. [2021-02-19 17:40:44,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:40:44,935 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 823 transitions. [2021-02-19 17:40:44,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:40:44,937 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:40:44,937 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:40:44,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-19 17:40:44,937 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:40:44,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:40:44,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1464817415, now seen corresponding path program 1 times [2021-02-19 17:40:44,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:40:44,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45408755] [2021-02-19 17:40:44,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:40:44,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:44,956 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:44,956 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:44,957 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:44,957 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:40:44,960 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:44,960 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:45,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:40:45,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:45,019 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:45,020 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:45,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:40:45,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45408755] [2021-02-19 17:40:45,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:40:45,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:40:45,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299856997] [2021-02-19 17:40:45,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:40:45,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:40:45,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:40:45,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:40:45,025 INFO L87 Difference]: Start difference. First operand 505 states and 823 transitions. Second operand 4 states. [2021-02-19 17:40:45,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:40:45,156 INFO L93 Difference]: Finished difference Result 909 states and 1505 transitions. [2021-02-19 17:40:45,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:40:45,157 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2021-02-19 17:40:45,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:40:45,162 INFO L225 Difference]: With dead ends: 909 [2021-02-19 17:40:45,162 INFO L226 Difference]: Without dead ends: 907 [2021-02-19 17:40:45,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:40:45,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2021-02-19 17:40:45,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 713. [2021-02-19 17:40:45,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713 states. [2021-02-19 17:40:45,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1135 transitions. [2021-02-19 17:40:45,190 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1135 transitions. Word has length 25 [2021-02-19 17:40:45,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:40:45,191 INFO L480 AbstractCegarLoop]: Abstraction has 713 states and 1135 transitions. [2021-02-19 17:40:45,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:40:45,191 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1135 transitions. [2021-02-19 17:40:45,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:40:45,192 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:40:45,193 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:40:45,193 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-19 17:40:45,193 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:40:45,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:40:45,193 INFO L82 PathProgramCache]: Analyzing trace with hash 878011401, now seen corresponding path program 1 times [2021-02-19 17:40:45,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:40:45,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238145746] [2021-02-19 17:40:45,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:40:45,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:45,212 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:45,212 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:45,213 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:45,213 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:40:45,216 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:45,216 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:45,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:40:45,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:45,241 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:45,242 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:45,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:40:45,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238145746] [2021-02-19 17:40:45,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:40:45,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:40:45,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577163559] [2021-02-19 17:40:45,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:40:45,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:40:45,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:40:45,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:40:45,247 INFO L87 Difference]: Start difference. First operand 713 states and 1135 transitions. Second operand 4 states. [2021-02-19 17:40:45,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:40:45,395 INFO L93 Difference]: Finished difference Result 1661 states and 2657 transitions. [2021-02-19 17:40:45,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:40:45,395 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2021-02-19 17:40:45,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:40:45,401 INFO L225 Difference]: With dead ends: 1661 [2021-02-19 17:40:45,401 INFO L226 Difference]: Without dead ends: 971 [2021-02-19 17:40:45,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:40:45,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-02-19 17:40:45,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 969. [2021-02-19 17:40:45,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 969 states. [2021-02-19 17:40:45,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1527 transitions. [2021-02-19 17:40:45,449 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1527 transitions. Word has length 25 [2021-02-19 17:40:45,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:40:45,449 INFO L480 AbstractCegarLoop]: Abstraction has 969 states and 1527 transitions. [2021-02-19 17:40:45,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:40:45,449 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1527 transitions. [2021-02-19 17:40:45,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 17:40:45,451 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:40:45,451 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:40:45,451 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-02-19 17:40:45,451 INFO L428 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:40:45,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:40:45,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1835085644, now seen corresponding path program 1 times [2021-02-19 17:40:45,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:40:45,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727840703] [2021-02-19 17:40:45,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:40:45,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:45,474 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:45,476 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:45,477 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:45,477 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-19 17:40:45,480 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:45,480 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:45,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:40:45,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:45,507 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:45,508 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:45,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:40:45,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727840703] [2021-02-19 17:40:45,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:40:45,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:40:45,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309514652] [2021-02-19 17:40:45,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:40:45,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:40:45,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:40:45,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:40:45,512 INFO L87 Difference]: Start difference. First operand 969 states and 1527 transitions. Second operand 4 states. [2021-02-19 17:40:45,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:40:45,674 INFO L93 Difference]: Finished difference Result 1453 states and 2281 transitions. [2021-02-19 17:40:45,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:40:45,674 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2021-02-19 17:40:45,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:40:45,680 INFO L225 Difference]: With dead ends: 1453 [2021-02-19 17:40:45,680 INFO L226 Difference]: Without dead ends: 987 [2021-02-19 17:40:45,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:40:45,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2021-02-19 17:40:45,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 985. [2021-02-19 17:40:45,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 985 states. [2021-02-19 17:40:45,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1527 transitions. [2021-02-19 17:40:45,732 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1527 transitions. Word has length 26 [2021-02-19 17:40:45,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:40:45,734 INFO L480 AbstractCegarLoop]: Abstraction has 985 states and 1527 transitions. [2021-02-19 17:40:45,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:40:45,734 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1527 transitions. [2021-02-19 17:40:45,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 17:40:45,736 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:40:45,736 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:40:45,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-02-19 17:40:45,737 INFO L428 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:40:45,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:40:45,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1448764402, now seen corresponding path program 1 times [2021-02-19 17:40:45,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:40:45,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956017259] [2021-02-19 17:40:45,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:40:45,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:45,762 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:45,763 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:45,764 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:45,764 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:40:45,767 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:45,768 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:45,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:40:45,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:45,794 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:45,794 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:45,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:40:45,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956017259] [2021-02-19 17:40:45,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:40:45,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:40:45,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634255874] [2021-02-19 17:40:45,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:40:45,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:40:45,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:40:45,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:40:45,799 INFO L87 Difference]: Start difference. First operand 985 states and 1527 transitions. Second operand 4 states. [2021-02-19 17:40:45,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:40:45,955 INFO L93 Difference]: Finished difference Result 1741 states and 2745 transitions. [2021-02-19 17:40:45,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:40:45,956 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2021-02-19 17:40:45,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:40:45,965 INFO L225 Difference]: With dead ends: 1741 [2021-02-19 17:40:45,966 INFO L226 Difference]: Without dead ends: 1739 [2021-02-19 17:40:45,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:40:45,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1739 states. [2021-02-19 17:40:46,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1739 to 1417. [2021-02-19 17:40:46,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1417 states. [2021-02-19 17:40:46,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1417 states to 1417 states and 2135 transitions. [2021-02-19 17:40:46,033 INFO L78 Accepts]: Start accepts. Automaton has 1417 states and 2135 transitions. Word has length 26 [2021-02-19 17:40:46,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:40:46,033 INFO L480 AbstractCegarLoop]: Abstraction has 1417 states and 2135 transitions. [2021-02-19 17:40:46,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:40:46,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1417 states and 2135 transitions. [2021-02-19 17:40:46,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 17:40:46,036 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:40:46,036 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:40:46,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-02-19 17:40:46,036 INFO L428 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:40:46,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:40:46,037 INFO L82 PathProgramCache]: Analyzing trace with hash 861958388, now seen corresponding path program 1 times [2021-02-19 17:40:46,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:40:46,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549005731] [2021-02-19 17:40:46,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:40:46,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:46,070 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:46,071 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:46,071 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:46,072 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:40:46,074 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:46,075 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:46,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:40:46,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:46,096 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:46,100 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:46,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:40:46,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549005731] [2021-02-19 17:40:46,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:40:46,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:40:46,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284883532] [2021-02-19 17:40:46,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:40:46,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:40:46,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:40:46,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:40:46,106 INFO L87 Difference]: Start difference. First operand 1417 states and 2135 transitions. Second operand 4 states. [2021-02-19 17:40:46,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:40:46,268 INFO L93 Difference]: Finished difference Result 3277 states and 4953 transitions. [2021-02-19 17:40:46,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:40:46,269 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2021-02-19 17:40:46,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:40:46,279 INFO L225 Difference]: With dead ends: 3277 [2021-02-19 17:40:46,279 INFO L226 Difference]: Without dead ends: 1899 [2021-02-19 17:40:46,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:40:46,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2021-02-19 17:40:46,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1897. [2021-02-19 17:40:46,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1897 states. [2021-02-19 17:40:46,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1897 states to 1897 states and 2823 transitions. [2021-02-19 17:40:46,387 INFO L78 Accepts]: Start accepts. Automaton has 1897 states and 2823 transitions. Word has length 26 [2021-02-19 17:40:46,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:40:46,388 INFO L480 AbstractCegarLoop]: Abstraction has 1897 states and 2823 transitions. [2021-02-19 17:40:46,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:40:46,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1897 states and 2823 transitions. [2021-02-19 17:40:46,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 17:40:46,391 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:40:46,391 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:40:46,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-02-19 17:40:46,391 INFO L428 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:40:46,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:40:46,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1962238590, now seen corresponding path program 1 times [2021-02-19 17:40:46,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:40:46,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753239456] [2021-02-19 17:40:46,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:40:46,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:46,410 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:46,411 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:46,412 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:46,412 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-19 17:40:46,415 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:46,416 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:46,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:40:46,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:46,437 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:46,438 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:46,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:40:46,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753239456] [2021-02-19 17:40:46,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:40:46,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:40:46,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513181259] [2021-02-19 17:40:46,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:40:46,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:40:46,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:40:46,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:40:46,441 INFO L87 Difference]: Start difference. First operand 1897 states and 2823 transitions. Second operand 4 states. [2021-02-19 17:40:46,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:40:46,592 INFO L93 Difference]: Finished difference Result 2845 states and 4217 transitions. [2021-02-19 17:40:46,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:40:46,592 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2021-02-19 17:40:46,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:40:46,602 INFO L225 Difference]: With dead ends: 2845 [2021-02-19 17:40:46,602 INFO L226 Difference]: Without dead ends: 1931 [2021-02-19 17:40:46,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:40:46,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1931 states. [2021-02-19 17:40:46,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1931 to 1929. [2021-02-19 17:40:46,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1929 states. [2021-02-19 17:40:46,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1929 states to 1929 states and 2823 transitions. [2021-02-19 17:40:46,681 INFO L78 Accepts]: Start accepts. Automaton has 1929 states and 2823 transitions. Word has length 27 [2021-02-19 17:40:46,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:40:46,682 INFO L480 AbstractCegarLoop]: Abstraction has 1929 states and 2823 transitions. [2021-02-19 17:40:46,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:40:46,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1929 states and 2823 transitions. [2021-02-19 17:40:46,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 17:40:46,685 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:40:46,685 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:40:46,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-02-19 17:40:46,685 INFO L428 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:40:46,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:40:46,686 INFO L82 PathProgramCache]: Analyzing trace with hash 951121340, now seen corresponding path program 1 times [2021-02-19 17:40:46,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:40:46,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006596302] [2021-02-19 17:40:46,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:40:46,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:46,703 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:46,704 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:46,704 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:46,705 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:40:46,707 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:46,708 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:46,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:40:46,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:46,729 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:46,729 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:46,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:40:46,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006596302] [2021-02-19 17:40:46,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:40:46,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:40:46,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693767486] [2021-02-19 17:40:46,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:40:46,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:40:46,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:40:46,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:40:46,733 INFO L87 Difference]: Start difference. First operand 1929 states and 2823 transitions. Second operand 4 states. [2021-02-19 17:40:46,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:40:46,910 INFO L93 Difference]: Finished difference Result 3341 states and 4969 transitions. [2021-02-19 17:40:46,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:40:46,910 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2021-02-19 17:40:46,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:40:46,926 INFO L225 Difference]: With dead ends: 3341 [2021-02-19 17:40:46,927 INFO L226 Difference]: Without dead ends: 3339 [2021-02-19 17:40:46,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:40:46,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3339 states. [2021-02-19 17:40:47,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3339 to 2825. [2021-02-19 17:40:47,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2825 states. [2021-02-19 17:40:47,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2825 states to 2825 states and 4007 transitions. [2021-02-19 17:40:47,055 INFO L78 Accepts]: Start accepts. Automaton has 2825 states and 4007 transitions. Word has length 27 [2021-02-19 17:40:47,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:40:47,055 INFO L480 AbstractCegarLoop]: Abstraction has 2825 states and 4007 transitions. [2021-02-19 17:40:47,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:40:47,056 INFO L276 IsEmpty]: Start isEmpty. Operand 2825 states and 4007 transitions. [2021-02-19 17:40:47,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 17:40:47,060 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:40:47,061 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:40:47,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-02-19 17:40:47,061 INFO L428 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:40:47,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:40:47,061 INFO L82 PathProgramCache]: Analyzing trace with hash 364315326, now seen corresponding path program 1 times [2021-02-19 17:40:47,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:40:47,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305804395] [2021-02-19 17:40:47,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:40:47,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:47,077 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:47,078 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:47,078 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:47,079 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:40:47,081 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:47,082 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:47,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:40:47,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:47,102 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:47,103 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:47,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:40:47,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305804395] [2021-02-19 17:40:47,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:40:47,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:40:47,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291356445] [2021-02-19 17:40:47,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:40:47,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:40:47,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:40:47,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:40:47,106 INFO L87 Difference]: Start difference. First operand 2825 states and 4007 transitions. Second operand 4 states. [2021-02-19 17:40:47,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:40:47,292 INFO L93 Difference]: Finished difference Result 6477 states and 9193 transitions. [2021-02-19 17:40:47,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:40:47,293 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2021-02-19 17:40:47,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:40:47,311 INFO L225 Difference]: With dead ends: 6477 [2021-02-19 17:40:47,311 INFO L226 Difference]: Without dead ends: 3723 [2021-02-19 17:40:47,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:40:47,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3723 states. [2021-02-19 17:40:47,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3723 to 3721. [2021-02-19 17:40:47,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3721 states. [2021-02-19 17:40:47,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3721 states to 3721 states and 5191 transitions. [2021-02-19 17:40:47,464 INFO L78 Accepts]: Start accepts. Automaton has 3721 states and 5191 transitions. Word has length 27 [2021-02-19 17:40:47,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:40:47,464 INFO L480 AbstractCegarLoop]: Abstraction has 3721 states and 5191 transitions. [2021-02-19 17:40:47,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:40:47,464 INFO L276 IsEmpty]: Start isEmpty. Operand 3721 states and 5191 transitions. [2021-02-19 17:40:47,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 17:40:47,499 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:40:47,499 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:40:47,499 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-02-19 17:40:47,499 INFO L428 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:40:47,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:40:47,500 INFO L82 PathProgramCache]: Analyzing trace with hash -579794103, now seen corresponding path program 1 times [2021-02-19 17:40:47,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:40:47,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190009473] [2021-02-19 17:40:47,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:40:47,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:47,515 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:47,516 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:47,516 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:47,517 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-19 17:40:47,520 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:47,520 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:47,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:40:47,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:47,541 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:47,542 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:47,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:40:47,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190009473] [2021-02-19 17:40:47,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:40:47,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:40:47,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491046746] [2021-02-19 17:40:47,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:40:47,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:40:47,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:40:47,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:40:47,545 INFO L87 Difference]: Start difference. First operand 3721 states and 5191 transitions. Second operand 4 states. [2021-02-19 17:40:47,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:40:47,719 INFO L93 Difference]: Finished difference Result 5581 states and 7753 transitions. [2021-02-19 17:40:47,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:40:47,720 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2021-02-19 17:40:47,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:40:47,738 INFO L225 Difference]: With dead ends: 5581 [2021-02-19 17:40:47,738 INFO L226 Difference]: Without dead ends: 3787 [2021-02-19 17:40:47,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:40:47,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3787 states. [2021-02-19 17:40:47,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3787 to 3785. [2021-02-19 17:40:47,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3785 states. [2021-02-19 17:40:47,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3785 states to 3785 states and 5191 transitions. [2021-02-19 17:40:47,913 INFO L78 Accepts]: Start accepts. Automaton has 3785 states and 5191 transitions. Word has length 28 [2021-02-19 17:40:47,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:40:47,913 INFO L480 AbstractCegarLoop]: Abstraction has 3785 states and 5191 transitions. [2021-02-19 17:40:47,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:40:47,913 INFO L276 IsEmpty]: Start isEmpty. Operand 3785 states and 5191 transitions. [2021-02-19 17:40:47,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 17:40:47,918 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:40:47,919 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:40:47,919 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-02-19 17:40:47,919 INFO L428 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:40:47,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:40:47,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1590911353, now seen corresponding path program 1 times [2021-02-19 17:40:47,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:40:47,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243412955] [2021-02-19 17:40:47,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:40:47,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:47,935 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:47,935 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:47,936 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:47,936 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:40:47,939 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:47,940 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:47,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:40:47,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:47,961 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:47,962 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:47,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:40:47,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243412955] [2021-02-19 17:40:47,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:40:47,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:40:47,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979645018] [2021-02-19 17:40:47,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:40:47,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:40:47,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:40:47,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:40:47,965 INFO L87 Difference]: Start difference. First operand 3785 states and 5191 transitions. Second operand 4 states. [2021-02-19 17:40:48,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:40:48,242 INFO L93 Difference]: Finished difference Result 6413 states and 8905 transitions. [2021-02-19 17:40:48,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:40:48,243 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2021-02-19 17:40:48,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:40:48,271 INFO L225 Difference]: With dead ends: 6413 [2021-02-19 17:40:48,271 INFO L226 Difference]: Without dead ends: 6411 [2021-02-19 17:40:48,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:40:48,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6411 states. [2021-02-19 17:40:48,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6411 to 5641. [2021-02-19 17:40:48,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5641 states. [2021-02-19 17:40:48,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5641 states to 5641 states and 7495 transitions. [2021-02-19 17:40:48,489 INFO L78 Accepts]: Start accepts. Automaton has 5641 states and 7495 transitions. Word has length 28 [2021-02-19 17:40:48,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:40:48,489 INFO L480 AbstractCegarLoop]: Abstraction has 5641 states and 7495 transitions. [2021-02-19 17:40:48,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:40:48,489 INFO L276 IsEmpty]: Start isEmpty. Operand 5641 states and 7495 transitions. [2021-02-19 17:40:48,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 17:40:48,502 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:40:48,502 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:40:48,502 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-02-19 17:40:48,503 INFO L428 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:40:48,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:40:48,503 INFO L82 PathProgramCache]: Analyzing trace with hash 2117249929, now seen corresponding path program 1 times [2021-02-19 17:40:48,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:40:48,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573783781] [2021-02-19 17:40:48,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:40:48,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:48,530 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:48,532 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:48,532 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:48,532 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:40:48,535 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:48,535 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:48,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:40:48,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:48,561 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:48,564 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:48,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:40:48,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573783781] [2021-02-19 17:40:48,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:40:48,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:40:48,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014022410] [2021-02-19 17:40:48,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:40:48,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:40:48,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:40:48,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:40:48,567 INFO L87 Difference]: Start difference. First operand 5641 states and 7495 transitions. Second operand 4 states. [2021-02-19 17:40:48,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:40:48,871 INFO L93 Difference]: Finished difference Result 12813 states and 16969 transitions. [2021-02-19 17:40:48,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:40:48,871 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2021-02-19 17:40:48,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:40:48,889 INFO L225 Difference]: With dead ends: 12813 [2021-02-19 17:40:48,889 INFO L226 Difference]: Without dead ends: 7307 [2021-02-19 17:40:48,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:40:48,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7307 states. [2021-02-19 17:40:49,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7307 to 7305. [2021-02-19 17:40:49,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7305 states. [2021-02-19 17:40:49,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7305 states to 7305 states and 9479 transitions. [2021-02-19 17:40:49,148 INFO L78 Accepts]: Start accepts. Automaton has 7305 states and 9479 transitions. Word has length 28 [2021-02-19 17:40:49,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:40:49,148 INFO L480 AbstractCegarLoop]: Abstraction has 7305 states and 9479 transitions. [2021-02-19 17:40:49,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:40:49,148 INFO L276 IsEmpty]: Start isEmpty. Operand 7305 states and 9479 transitions. [2021-02-19 17:40:49,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:40:49,159 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:40:49,159 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:40:49,159 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-02-19 17:40:49,159 INFO L428 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:40:49,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:40:49,160 INFO L82 PathProgramCache]: Analyzing trace with hash -2073395917, now seen corresponding path program 1 times [2021-02-19 17:40:49,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:40:49,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790693874] [2021-02-19 17:40:49,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:40:49,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:49,179 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:49,180 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:49,181 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:49,181 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-19 17:40:49,183 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:49,184 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:49,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:40:49,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:49,206 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:49,207 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:49,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:40:49,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790693874] [2021-02-19 17:40:49,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:40:49,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:40:49,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674817397] [2021-02-19 17:40:49,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:40:49,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:40:49,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:40:49,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:40:49,211 INFO L87 Difference]: Start difference. First operand 7305 states and 9479 transitions. Second operand 4 states. [2021-02-19 17:40:49,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:40:49,474 INFO L93 Difference]: Finished difference Result 10957 states and 14153 transitions. [2021-02-19 17:40:49,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:40:49,474 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2021-02-19 17:40:49,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:40:49,490 INFO L225 Difference]: With dead ends: 10957 [2021-02-19 17:40:49,491 INFO L226 Difference]: Without dead ends: 7435 [2021-02-19 17:40:49,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:40:49,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7435 states. [2021-02-19 17:40:49,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7435 to 7433. [2021-02-19 17:40:49,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7433 states. [2021-02-19 17:40:49,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7433 states to 7433 states and 9479 transitions. [2021-02-19 17:40:49,726 INFO L78 Accepts]: Start accepts. Automaton has 7433 states and 9479 transitions. Word has length 29 [2021-02-19 17:40:49,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:40:49,726 INFO L480 AbstractCegarLoop]: Abstraction has 7433 states and 9479 transitions. [2021-02-19 17:40:49,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:40:49,726 INFO L276 IsEmpty]: Start isEmpty. Operand 7433 states and 9479 transitions. [2021-02-19 17:40:49,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:40:49,736 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:40:49,737 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:40:49,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-02-19 17:40:49,737 INFO L428 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:40:49,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:40:49,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1210454129, now seen corresponding path program 1 times [2021-02-19 17:40:49,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:40:49,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134658991] [2021-02-19 17:40:49,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:40:49,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:49,754 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:49,755 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:49,757 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:49,757 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:40:49,760 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:49,760 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:49,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:40:49,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:49,780 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:49,780 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:49,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:40:49,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134658991] [2021-02-19 17:40:49,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:40:49,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:40:49,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268823110] [2021-02-19 17:40:49,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:40:49,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:40:49,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:40:49,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:40:49,784 INFO L87 Difference]: Start difference. First operand 7433 states and 9479 transitions. Second operand 4 states. [2021-02-19 17:40:50,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:40:50,117 INFO L93 Difference]: Finished difference Result 12301 states and 15753 transitions. [2021-02-19 17:40:50,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:40:50,117 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2021-02-19 17:40:50,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:40:50,145 INFO L225 Difference]: With dead ends: 12301 [2021-02-19 17:40:50,145 INFO L226 Difference]: Without dead ends: 12299 [2021-02-19 17:40:50,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:40:50,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12299 states. [2021-02-19 17:40:50,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12299 to 11273. [2021-02-19 17:40:50,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11273 states. [2021-02-19 17:40:50,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11273 states to 11273 states and 13959 transitions. [2021-02-19 17:40:50,522 INFO L78 Accepts]: Start accepts. Automaton has 11273 states and 13959 transitions. Word has length 29 [2021-02-19 17:40:50,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:40:50,522 INFO L480 AbstractCegarLoop]: Abstraction has 11273 states and 13959 transitions. [2021-02-19 17:40:50,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:40:50,522 INFO L276 IsEmpty]: Start isEmpty. Operand 11273 states and 13959 transitions. [2021-02-19 17:40:50,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:40:50,540 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:40:50,540 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:40:50,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-02-19 17:40:50,541 INFO L428 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:40:50,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:40:50,541 INFO L82 PathProgramCache]: Analyzing trace with hash 623648115, now seen corresponding path program 1 times [2021-02-19 17:40:50,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:40:50,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498891972] [2021-02-19 17:40:50,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:40:50,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:50,567 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:50,568 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:50,568 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:50,568 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:40:50,571 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:50,578 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:50,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:40:50,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:50,600 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:50,600 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:50,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:40:50,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498891972] [2021-02-19 17:40:50,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:40:50,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:40:50,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33818833] [2021-02-19 17:40:50,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:40:50,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:40:50,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:40:50,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:40:50,604 INFO L87 Difference]: Start difference. First operand 11273 states and 13959 transitions. Second operand 4 states. [2021-02-19 17:40:50,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:40:50,992 INFO L93 Difference]: Finished difference Result 25357 states and 31113 transitions. [2021-02-19 17:40:50,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:40:50,993 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2021-02-19 17:40:50,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:40:51,022 INFO L225 Difference]: With dead ends: 25357 [2021-02-19 17:40:51,022 INFO L226 Difference]: Without dead ends: 14347 [2021-02-19 17:40:51,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:40:51,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14347 states. [2021-02-19 17:40:51,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14347 to 14345. [2021-02-19 17:40:51,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14345 states. [2021-02-19 17:40:51,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14345 states to 14345 states and 17159 transitions. [2021-02-19 17:40:51,501 INFO L78 Accepts]: Start accepts. Automaton has 14345 states and 17159 transitions. Word has length 29 [2021-02-19 17:40:51,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:40:51,501 INFO L480 AbstractCegarLoop]: Abstraction has 14345 states and 17159 transitions. [2021-02-19 17:40:51,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:40:51,501 INFO L276 IsEmpty]: Start isEmpty. Operand 14345 states and 17159 transitions. [2021-02-19 17:40:51,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 17:40:51,519 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:40:51,520 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:40:51,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-02-19 17:40:51,520 INFO L428 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:40:51,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:40:51,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1130411554, now seen corresponding path program 1 times [2021-02-19 17:40:51,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:40:51,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071699470] [2021-02-19 17:40:51,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:40:51,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:51,537 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:51,538 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:51,538 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:51,539 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-19 17:40:51,541 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:51,542 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:51,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:40:51,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:51,561 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:51,561 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:51,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:40:51,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071699470] [2021-02-19 17:40:51,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:40:51,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:40:51,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772297218] [2021-02-19 17:40:51,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:40:51,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:40:51,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:40:51,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:40:51,565 INFO L87 Difference]: Start difference. First operand 14345 states and 17159 transitions. Second operand 4 states. [2021-02-19 17:40:51,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:40:51,941 INFO L93 Difference]: Finished difference Result 21517 states and 25609 transitions. [2021-02-19 17:40:51,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:40:51,941 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2021-02-19 17:40:51,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:40:51,969 INFO L225 Difference]: With dead ends: 21517 [2021-02-19 17:40:51,970 INFO L226 Difference]: Without dead ends: 14603 [2021-02-19 17:40:51,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:40:51,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14603 states. [2021-02-19 17:40:52,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14603 to 14601. [2021-02-19 17:40:52,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14601 states. [2021-02-19 17:40:52,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14601 states to 14601 states and 17159 transitions. [2021-02-19 17:40:52,445 INFO L78 Accepts]: Start accepts. Automaton has 14601 states and 17159 transitions. Word has length 30 [2021-02-19 17:40:52,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:40:52,445 INFO L480 AbstractCegarLoop]: Abstraction has 14601 states and 17159 transitions. [2021-02-19 17:40:52,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:40:52,445 INFO L276 IsEmpty]: Start isEmpty. Operand 14601 states and 17159 transitions. [2021-02-19 17:40:52,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 17:40:52,469 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:40:52,469 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:40:52,469 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-02-19 17:40:52,469 INFO L428 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:40:52,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:40:52,470 INFO L82 PathProgramCache]: Analyzing trace with hash -2141528804, now seen corresponding path program 1 times [2021-02-19 17:40:52,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:40:52,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724332562] [2021-02-19 17:40:52,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:40:52,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:52,483 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:52,484 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:52,484 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:52,485 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:40:52,487 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:52,488 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:52,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:40:52,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:52,507 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:52,508 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:52,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:40:52,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724332562] [2021-02-19 17:40:52,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:40:52,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:40:52,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840398015] [2021-02-19 17:40:52,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:40:52,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:40:52,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:40:52,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:40:52,511 INFO L87 Difference]: Start difference. First operand 14601 states and 17159 transitions. Second operand 4 states. [2021-02-19 17:40:53,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:40:53,115 INFO L93 Difference]: Finished difference Result 42251 states and 48392 transitions. [2021-02-19 17:40:53,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:40:53,116 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2021-02-19 17:40:53,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:40:53,147 INFO L225 Difference]: With dead ends: 42251 [2021-02-19 17:40:53,147 INFO L226 Difference]: Without dead ends: 14601 [2021-02-19 17:40:53,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:40:53,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14601 states. [2021-02-19 17:40:53,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14601 to 14601. [2021-02-19 17:40:53,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14601 states. [2021-02-19 17:40:53,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14601 states to 14601 states and 16135 transitions. [2021-02-19 17:40:53,766 INFO L78 Accepts]: Start accepts. Automaton has 14601 states and 16135 transitions. Word has length 30 [2021-02-19 17:40:53,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:40:53,766 INFO L480 AbstractCegarLoop]: Abstraction has 14601 states and 16135 transitions. [2021-02-19 17:40:53,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:40:53,766 INFO L276 IsEmpty]: Start isEmpty. Operand 14601 states and 16135 transitions. [2021-02-19 17:40:53,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 17:40:53,788 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:40:53,788 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:40:53,788 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-02-19 17:40:53,789 INFO L428 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:40:53,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:40:53,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1554722790, now seen corresponding path program 1 times [2021-02-19 17:40:53,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:40:53,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413830629] [2021-02-19 17:40:53,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:40:53,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:53,802 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:53,803 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:53,804 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:53,804 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:40:53,806 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:53,806 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:53,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:40:53,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:40:53,834 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:40:53,835 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:40:53,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:40:53,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413830629] [2021-02-19 17:40:53,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:40:53,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:40:53,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756657893] [2021-02-19 17:40:53,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:40:53,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:40:53,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:40:53,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:40:53,838 INFO L87 Difference]: Start difference. First operand 14601 states and 16135 transitions. Second operand 4 states. [2021-02-19 17:40:54,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:40:54,096 INFO L93 Difference]: Finished difference Result 14601 states and 16135 transitions. [2021-02-19 17:40:54,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:40:54,097 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2021-02-19 17:40:54,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:40:54,097 INFO L225 Difference]: With dead ends: 14601 [2021-02-19 17:40:54,097 INFO L226 Difference]: Without dead ends: 0 [2021-02-19 17:40:54,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:40:54,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-19 17:40:54,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-19 17:40:54,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-19 17:40:54,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-19 17:40:54,118 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2021-02-19 17:40:54,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:40:54,119 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-19 17:40:54,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:40:54,119 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-19 17:40:54,119 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-19 17:40:54,119 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-02-19 17:40:54,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-19 17:41:12,900 WARN L202 SmtUtils]: Spent 18.74 s on a formula simplification. DAG size of input: 2637 DAG size of output: 32 [2021-02-19 17:41:12,931 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-19 17:41:12,931 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-19 17:41:12,931 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-19 17:41:12,932 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-02-19 17:41:12,932 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-02-19 17:41:12,932 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-02-19 17:41:12,933 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-02-19 17:41:12,933 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-19 17:41:12,933 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-19 17:41:12,933 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-02-19 17:41:12,933 INFO L189 CegarLoopUtils]: For program point L126(line 126) no Hoare annotation was computed. [2021-02-19 17:41:12,934 INFO L189 CegarLoopUtils]: For program point mainEXIT(lines 6 165) no Hoare annotation was computed. [2021-02-19 17:41:12,934 INFO L189 CegarLoopUtils]: For program point L151(line 151) no Hoare annotation was computed. [2021-02-19 17:41:12,934 INFO L189 CegarLoopUtils]: For program point L110-1(lines 41 160) no Hoare annotation was computed. [2021-02-19 17:41:12,934 INFO L189 CegarLoopUtils]: For program point L135-1(lines 41 160) no Hoare annotation was computed. [2021-02-19 17:41:12,934 INFO L189 CegarLoopUtils]: For program point L111(line 111) no Hoare annotation was computed. [2021-02-19 17:41:12,934 INFO L189 CegarLoopUtils]: For program point L136(line 136) no Hoare annotation was computed. [2021-02-19 17:41:12,934 INFO L192 CegarLoopUtils]: At program point L161(lines 7 165) the Hoare annotation is: true [2021-02-19 17:41:12,935 INFO L189 CegarLoopUtils]: For program point L120-1(lines 41 160) no Hoare annotation was computed. [2021-02-19 17:41:12,935 INFO L189 CegarLoopUtils]: For program point L145-1(lines 41 160) no Hoare annotation was computed. [2021-02-19 17:41:12,935 INFO L189 CegarLoopUtils]: For program point mainFINAL(lines 6 165) no Hoare annotation was computed. [2021-02-19 17:41:12,935 INFO L189 CegarLoopUtils]: For program point L104-1(lines 41 160) no Hoare annotation was computed. [2021-02-19 17:41:12,935 INFO L189 CegarLoopUtils]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 163) no Hoare annotation was computed. [2021-02-19 17:41:12,935 INFO L189 CegarLoopUtils]: For program point L96-1(lines 41 160) no Hoare annotation was computed. [2021-02-19 17:41:12,935 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 6 165) the Hoare annotation is: true [2021-02-19 17:41:12,935 INFO L189 CegarLoopUtils]: For program point L121(line 121) no Hoare annotation was computed. [2021-02-19 17:41:12,935 INFO L189 CegarLoopUtils]: For program point L88-1(lines 41 160) no Hoare annotation was computed. [2021-02-19 17:41:12,935 INFO L189 CegarLoopUtils]: For program point L146(line 146) no Hoare annotation was computed. [2021-02-19 17:41:12,936 INFO L189 CegarLoopUtils]: For program point L80-1(lines 41 160) no Hoare annotation was computed. [2021-02-19 17:41:12,936 INFO L189 CegarLoopUtils]: For program point L72-1(lines 41 160) no Hoare annotation was computed. [2021-02-19 17:41:12,936 INFO L189 CegarLoopUtils]: For program point L130-1(lines 41 160) no Hoare annotation was computed. [2021-02-19 17:41:12,936 INFO L192 CegarLoopUtils]: At program point L155-1(lines 41 160) the Hoare annotation is: true [2021-02-19 17:41:12,936 INFO L189 CegarLoopUtils]: For program point L131(line 131) no Hoare annotation was computed. [2021-02-19 17:41:12,936 INFO L189 CegarLoopUtils]: For program point L156(line 156) no Hoare annotation was computed. [2021-02-19 17:41:12,936 INFO L185 CegarLoopUtils]: At program point L156-1(lines 7 165) the Hoare annotation is: false [2021-02-19 17:41:12,936 INFO L189 CegarLoopUtils]: For program point L115-1(lines 41 160) no Hoare annotation was computed. [2021-02-19 17:41:12,936 INFO L189 CegarLoopUtils]: For program point L140-1(lines 41 160) no Hoare annotation was computed. [2021-02-19 17:41:12,937 INFO L189 CegarLoopUtils]: For program point L116(line 116) no Hoare annotation was computed. [2021-02-19 17:41:12,937 INFO L189 CegarLoopUtils]: For program point L141(line 141) no Hoare annotation was computed. [2021-02-19 17:41:12,937 INFO L189 CegarLoopUtils]: For program point L100-1(lines 41 160) no Hoare annotation was computed. [2021-02-19 17:41:12,937 INFO L189 CegarLoopUtils]: For program point L125-1(lines 41 160) no Hoare annotation was computed. [2021-02-19 17:41:12,937 INFO L189 CegarLoopUtils]: For program point L92-1(lines 41 160) no Hoare annotation was computed. [2021-02-19 17:41:12,937 INFO L189 CegarLoopUtils]: For program point L150-1(lines 41 160) no Hoare annotation was computed. [2021-02-19 17:41:12,937 INFO L189 CegarLoopUtils]: For program point L84-1(lines 41 160) no Hoare annotation was computed. [2021-02-19 17:41:12,937 INFO L189 CegarLoopUtils]: For program point L43(lines 43 45) no Hoare annotation was computed. [2021-02-19 17:41:12,937 INFO L189 CegarLoopUtils]: For program point L76-1(lines 41 160) no Hoare annotation was computed. [2021-02-19 17:41:12,937 INFO L189 CegarLoopUtils]: For program point L68(lines 68 70) no Hoare annotation was computed. [2021-02-19 17:41:12,938 INFO L189 CegarLoopUtils]: For program point L68-2(lines 41 160) no Hoare annotation was computed. [2021-02-19 17:41:12,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 05:41:12 BoogieIcfgContainer [2021-02-19 17:41:12,953 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 17:41:12,954 INFO L168 Benchmark]: Toolchain (without parser) took 32301.94 ms. Allocated memory was 162.5 MB in the beginning and 1.7 GB in the end (delta: 1.5 GB). Free memory was 138.0 MB in the beginning and 1.4 GB in the end (delta: -1.3 GB). Peak memory consumption was 1.1 GB. Max. memory is 8.0 GB. [2021-02-19 17:41:12,955 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 162.5 MB. Free memory is still 138.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-19 17:41:12,956 INFO L168 Benchmark]: CACSL2BoogieTranslator took 253.77 ms. Allocated memory is still 162.5 MB. Free memory was 137.0 MB in the beginning and 126.6 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-19 17:41:12,957 INFO L168 Benchmark]: Boogie Preprocessor took 41.82 ms. Allocated memory is still 162.5 MB. Free memory was 126.6 MB in the beginning and 124.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-19 17:41:12,965 INFO L168 Benchmark]: RCFGBuilder took 490.28 ms. Allocated memory is still 162.5 MB. Free memory was 124.8 MB in the beginning and 141.6 MB in the end (delta: -16.8 MB). Peak memory consumption was 23.0 MB. Max. memory is 8.0 GB. [2021-02-19 17:41:12,965 INFO L168 Benchmark]: TraceAbstraction took 31495.35 ms. Allocated memory was 162.5 MB in the beginning and 1.7 GB in the end (delta: 1.5 GB). Free memory was 141.6 MB in the beginning and 1.4 GB in the end (delta: -1.3 GB). Peak memory consumption was 1.1 GB. Max. memory is 8.0 GB. [2021-02-19 17:41:12,967 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 162.5 MB. Free memory is still 138.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 253.77 ms. Allocated memory is still 162.5 MB. Free memory was 137.0 MB in the beginning and 126.6 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.82 ms. Allocated memory is still 162.5 MB. Free memory was 126.6 MB in the beginning and 124.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 490.28 ms. Allocated memory is still 162.5 MB. Free memory was 124.8 MB in the beginning and 141.6 MB in the end (delta: -16.8 MB). Peak memory consumption was 23.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 31495.35 ms. Allocated memory was 162.5 MB in the beginning and 1.7 GB in the end (delta: 1.5 GB). Free memory was 141.6 MB in the beginning and 1.4 GB in the end (delta: -1.3 GB). Peak memory consumption was 1.1 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 163]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 41]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 48 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 12.5s, OverallIterations: 28, TraceHistogramMax: 1, AutomataDifference: 6.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 18.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2358 SDtfs, 3551 SDslu, 172 SDs, 0 SdLazy, 1707 SolverSat, 66 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 195 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14601occurred in iteration=26, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.5s AutomataMinimizationTime, 28 MinimizatonAttempts, 3100 StatesRemovedByMinimization, 26 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 1034 NumberOfFragments, 37 HoareAnnotationTreeSize, 7 FomulaSimplifications, 27454566 FormulaSimplificationTreeSizeReduction, 18.7s HoareSimplificationTime, 7 FomulaSimplificationsInter, 90 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 721 NumberOfCodeBlocks, 721 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 693 ConstructedInterpolants, 0 QuantifiedInterpolants, 54541 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 28 InterpolantComputations, 28 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...